Eduard vongeriohten



'EDUARD vononhi ro THE EARB PROCESS QPMAKING p V, V SPEGIFIGATIONIorming part ofllzetters Application filed December 13, 1890. Serial No.'374.598. art" in England December 23, 1889, No. 20,678 No. 88,989, andin Italy April 3, 1890,

To all whomiiinwyconc'efh Be it known that I, EDUARD'VONGERICH' TEN, doctor of philosophy, a subject of the Emperor of Germany, residing at Hdchst-on-the- 5 Main, in the Empire of Germany, have invented certain new and useful Improvements in the Production of Compounds of the Diphenylmethan Group,

November 27, 1889, No. 53,937; in England No. 20,678; in France December 23, 1889, No. 202,769; in Belgium Dennber 3L1S9, N FT-1890, XXIV, 27,054, andLllI, hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it. appertains to make and use the same.

This invention relates to the production of henylmethan group by aldehyde upon certain aroor example:

c arm,

166;) andI do O ILNH (Diamido-diphenylmethan.)

fully explained by the ction of the diamidothe action of formaldehyde upon aniline isobtained,as is well known, in the first stage the anhydro-formaldehyde aniline, (O H N=0H e conversion of this compound into the (Formaldehyde) (Aniline) The process is more process for the produ diphenylmethan. By

bath while being kept seventy parts of hydro an excess of aniline.

comes semi-liquid. A rendered alkaline an is driven 0E. The 0 agitated together with chlorate of aniline and The mass graduallybewhich it separates in the form of compact O'HTEN, 0F HooHsT-oN-THE WERKn, VQRMALS MEISTER, L

IAMIDO-ISIPHENYLM-EBTHAN.BASE

patented in Germany in Ital-y April fter twelve hours it is p from benzole, from PATENT fOFFlCE."

-MAIN, GERMANYfASSIGN OR UCIUS & BRUNING,0F-=SAME Patent Ala-471,659, dated March 29, 1892.

specimens) Patented in Germanyllovember 27,1889, No. 63,987; i in France Decefib'er'2fi l889, No. 202,769 XXIV, 27,054, and L111, 166.

; in Belgium December 31', 1889,

separates in the form having a melting-point crystals. From water it of brilliant leaflets, of 87 centigrade. 1

Instead of separating first the anhydro mal dehyd'e aniline and subse it to act u mixture of aniline. and h line.

The'hom'oiogiie's lif the di methan are produced in an For example: Anhydro-forrnaldehyde aniline 60 is caused to act upon hydrochlorate of orth 0- toluidine and ortho -'toluidine, anhydr0-for-' maldehyde-ortho-toluidine upon hydrochlorate of aniline and aniline, anhydro-formaldehyde-ortho-toluidine upon hydrochlorate of' 65 ortho-toluidine and ortho-toluidine, anhydroformaldehyde-aniline upon hydrochlorate of dimethylaniline and dimethylaniline, anhydro-formaldehyde-ortho-toluidine upon hydrochlorate of dimethylaniline and di ydi'ochlorate of analogous way.

gous way into com methan group. amine (two 1110].)

g a body (0 11 17 which I denoniinate dlphenyl diamido diphenylinethan. The production of this b y is carried out in the 85 parts, by weight, of alcohol, and then 22.2 parts, by weight, of formaldehyde of forty per centhare added to the solution, which is go then heated to 60 centigrade, five parts, by weight, of hydrochloric acidiieing added.

amidodiphenyl- There is violent reaction,the mixture becoming dark. When the reaction is finished, the diphenyl-diamido diphenylmethan is separated in theform of a solid crystalline mass. Left exposed to the air it assumes a yellowbrown color. The diphenyl-diamido diphenylmethan is of diflicult solubility or almost insoluble in'all indifferent solvents; In aromatic bases alone it is somewhat easily soluble. In diluted acids it is insoluble; but on being heated in concentrated sulphuric acid it dissolves, assuming a brown color. In a like manner, formaldehyde reacts with other secondary aromatic bases-such as ortho and I naphthylphenylamine All these products hayequalities' similar to those of the dipheuyl-diamitlo-dipheuylmethan above described.

Thenon-alkalizeddiamido-diphenylmethan bases are of easy solubility in diluted acids,

in alcohol, benzine, and toluene, of difficult solubility in water and ether. The plienylized .30

diamido-diphenylmethan bases are nearly insoluble in all the indifferent solvents, but soluble in concentrated mineral acids.

What I claim as my invention, and wish to' secure by Letters Patent, is-

The herein described process for the production of diamido-diphenylmethan bases by the action of hydrochlorates of aromatic amines upon the anhydro-fiormaldehyde compounds of aromatic amines, substantially as set fior'th.

In testimony whereof I aflix my signature in presence of two witnesses.

- EDUARD VONGERIOHTEN. Witnesses:

J OSEF REVERDY, HEINRICH HAHN. 

